Hi guys,I'm going to close this thread, as it's meant to be an announcement, and create a new discussion around the zimbraReverseProxyStrictServerName on the Administrators one, I hope that's okay with everyone.

However is Universal UI not part of 8.8? or is it just not part of the FOSS version ?

Thank you for asking about Zimbra's Universal UI project. The Universal UI beta phase is now completing--we got great input during that process. Please look for an update from us about Universal UI in January 2018. Thank you!